Humanscale Access Rail Wall Mount User Manual

Installation Instructions for NPR 638 Access Rail Wall Mount

Step 1: Locate Studs and Screw in SU Mounts

 SU Mounts to be positioned with teeth facing UP
 ALL FOUR screws to be drilled into the same stud
 Both SU Mounts to be measured with level device
 Confirm that screw heads are flush or recessed into countersink

o Access Rail will not slide onto mounts if screws are sticking out into the

space between teeth

Screw Heads Flush to Surface SU Mounts Level on Wall

Step 2: Attach Access Rail

 Mount the Access Rail onto the SU Mounts from the front, confirm that Access

Rail teeth are interlocked with SU Mount teeth

 Slide the Access Rail so that the middle of the Rail is approximately located in the

middle of the space between both SU Mounts

Access Rail Mounted on SU Mounts

Step 3: Attach Thumb Screw Bracket

SU Mount

Oval Nut
Corner Bracket

 Insert Thumb Screw into Corner Bracket from the bottom
 Position Oval Nut on top of the Thumb Screw, thread nut only a few revolutions

so that nut stays on the top of Thumb Screw

 Line up top edge of Corner Bracket so that it contacts the bottom edge of the SU

Mount

o You will be able to feel the contact made between the two parts

 Carefully turn the thumb screw in the clockwise direction
 After several revolutions you will feel the Oval Nut begin to tighten against the

bottom flange of the Access Rail

 If the Oval Nut slips then repeat this step until there is a secure fit and you can

pull down on the Thumb Screw Bracket without it falling off

Assemble Thumb Screw Bracket

Tighten Thumb Screw, Ensure Contact with SU Mount

Final Product